Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures
Osteosynthesis resorbable materials made of uncalcined and unsintered hydroxyapatite (u-HA) particles, poly-L-lactide (PLLA), are bioresorbable, and these materials have feasible bioactive/osteoconductive capacities. However, their strength and stability for fixation in mandibular condylar head frac...
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doaj-0bbeafef664d418e9f1dc409427376e42020-11-25T02:32:38ZengMDPI AGMaterials1996-19442020-07-01133153315310.3390/ma13143153Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head FracturesShintaro Sukegawa0Norio Yamamoto1Keisuke Nakano2Kiyofumi Takabatake3Hotaka Kawai4Takahiro Kanno5Hitoshi Nagatsuka6Yoshihiko Furuki7Department of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, 1-2-1, Asahi-machi, Takamatsu, Kagawa 760-8557, JapanDepartment of Orthopaedic Surgery, Kagawa Prefectural Central Hospital, Takamatsu, Kagawa 60-0065, JapanDepartment of Oral Pathology and Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8530, JapanDepartment of Oral Pathology and Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8530, JapanDepartment of Oral Pathology and Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8530, JapanDepartment of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine, Shimane 693-0021, JapanDepartment of Oral Pathology and Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8530, JapanDepartment of Oral and Maxillofacial Surgery, Kagawa Prefectural Central Hospital, 1-2-1, Asahi-machi, Takamatsu, Kagawa 760-8557, JapanOsteosynthesis resorbable materials made of uncalcined and unsintered hydroxyapatite (u-HA) particles, poly-L-lactide (PLLA), are bioresorbable, and these materials have feasible bioactive/osteoconductive capacities. However, their strength and stability for fixation in mandibular condylar head fractures remain unclear. This in vitro study aimed to assess the biomechanical strength of u-HA/PLLA screws after the internal fixation of condylar head fractures. To evaluate their biomechanical behavior, 32 hemimandible replicas were divided into eight groups, each consisting of single-screw and double-screw fixations with titanium or u-HA/PLLA screws. A linear load was applied as vertical and horizontal load to each group to simulate the muscular forces in condylar head fractures. Samples were examined for 0.5, 1, 2, and 3-mm displacement loads. Two screws were needed for stable fixation of the mandibular condylar head fracture during biomechanical evaluation. After screw fixation for condylar head fractures, the titanium screws model was slightly more resistant to vertical and horizontal movement with a load for a small displacement than the u-HA/PLLA screws model. There was no statistically significant difference with load for large displacements. The u-HA/PLLA screw has a low mechanical resistance under small displacement loading compared with titanium within the limits of the mandibular head fracture model study.https://www.mdpi.com/1996-1944/13/14/3153titanium screwbioactive resorbable screwbiomechanical loading evaluationfracture fixationintracapsular condylar head fracture |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shintaro Sukegawa Norio Yamamoto Keisuke Nakano Kiyofumi Takabatake Hotaka Kawai Takahiro Kanno Hitoshi Nagatsuka Yoshihiko Furuki |
spellingShingle |
Shintaro Sukegawa Norio Yamamoto Keisuke Nakano Kiyofumi Takabatake Hotaka Kawai Takahiro Kanno Hitoshi Nagatsuka Yoshihiko Furuki Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures Materials titanium screw bioactive resorbable screw biomechanical loading evaluation fracture fixation intracapsular condylar head fracture |
author_facet |
Shintaro Sukegawa Norio Yamamoto Keisuke Nakano Kiyofumi Takabatake Hotaka Kawai Takahiro Kanno Hitoshi Nagatsuka Yoshihiko Furuki |
author_sort |
Shintaro Sukegawa |
title |
Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures |
title_short |
Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures |
title_full |
Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures |
title_fullStr |
Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures |
title_full_unstemmed |
Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures |
title_sort |
biomechanical loading comparison between titanium and bioactive resorbable screw systems for fixation of intracapsular condylar head fractures |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-07-01 |
description |
Osteosynthesis resorbable materials made of uncalcined and unsintered hydroxyapatite (u-HA) particles, poly-L-lactide (PLLA), are bioresorbable, and these materials have feasible bioactive/osteoconductive capacities. However, their strength and stability for fixation in mandibular condylar head fractures remain unclear. This in vitro study aimed to assess the biomechanical strength of u-HA/PLLA screws after the internal fixation of condylar head fractures. To evaluate their biomechanical behavior, 32 hemimandible replicas were divided into eight groups, each consisting of single-screw and double-screw fixations with titanium or u-HA/PLLA screws. A linear load was applied as vertical and horizontal load to each group to simulate the muscular forces in condylar head fractures. Samples were examined for 0.5, 1, 2, and 3-mm displacement loads. Two screws were needed for stable fixation of the mandibular condylar head fracture during biomechanical evaluation. After screw fixation for condylar head fractures, the titanium screws model was slightly more resistant to vertical and horizontal movement with a load for a small displacement than the u-HA/PLLA screws model. There was no statistically significant difference with load for large displacements. The u-HA/PLLA screw has a low mechanical resistance under small displacement loading compared with titanium within the limits of the mandibular head fracture model study. |
topic |
titanium screw bioactive resorbable screw biomechanical loading evaluation fracture fixation intracapsular condylar head fracture |
url |
https://www.mdpi.com/1996-1944/13/14/3153 |
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